Screen.



N. ELLWART.

SCREEN.

Patented July 20; 1909'.

APPLIOATION FILED HOV. 29,1907.

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ANDREW. a. GRAHAM 00.. PNOYO-LITNDG NICHOLAS ELLWART, OF CHICAGO, ILLINOIS.

SCREEN.

Specification of Letters Patent.

Patented July 20, 1909.

Application filed November 29, 1907. Serial No. 404,250.

To all whom it may concern:

Be it known that I, NICHOLAS ELLWART, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Screens, of which the following is a specification.

My invention relates to improvements in the structural formation of door and window screens, and includes the method of forming the frame, means for connecting the wire screen thereto and the manner of attaching the completed screen to the frame of a door or window.

The chief objects of the improvements which form the subject matter of this application are, to provide a durable and efficient method of securing the margins of wire cloth to a frame; to furnish a convenient and easily operated device for ten sioning the fabric; and to supply a screen from which the wire can be readily detached and replaced.

Other important objects of my invention are to furnish a simple and efficient means for clamping the wire cloth margins, the holding devices being constructed with a view of avoiding the formation of abrupt bends in the material entering into the construction of the screen which is ordinarily made of woven wire.

I accomplish the objects sought by the device illustrated in the accompanying drawing which forms a part of this application, and in which Figure 1 is a front elevation of a portion of a screen door frame equipped with my improved molding, and Fig. 2 is a sectional view, enlarged, taken 011 the lines 22 of Fig. 1. 5

Referring to the details of the drawing, the numeral 5 indicates the door-frame, and 6 the intervening space or opening, covered by a sheet of woven wire screen 7. The margins of said screen are concealed beneath strips of molding 8 which are secured adjacent the edges of the openings 6, the said strips serving to clamp and hold the stretched fabric 7 in a manner to be presently described.

The moldings 8 are preferably made of sheet metal formed into strips or ribbons of suitable width and the margins of the material are then inturned to form a tubular member, one side 9 being flattened to rest upon the frame surface and the outer ing overlap eachother and the inner margin is curved upon itself as shown at 10.

"The edges of the wire screen are received between the said margins of the molding, and the extreme border 7 of said screen is extended within the cavity. The inherent rigidity of the material composing said screen will prevent any slipping of the fold engaging the turned margin 10 when traction is made upon the molding to stretch the screen. This tensioning of the fabric may be done before the screen is applied to the door or window frame, or simultaneously with its attachment thereto. In either case the strips 8 are cut with suitable miters 11, and after the wire has been suf ficiently stretched the strips of molding are secured to the frame 5 by screws 12 which pass through both the outer and inner walls of the molding.

As the stretching of the wire screen will cause the corner joinings to be more or less open, I provide corner pieces 13 which are so designed as to fit snugly over the corners, and are then preferably secured to the moldings by soldering.

Various methods well understood by those skilled in the art may be employed to stretch the screen, one of which will be here disclosed :The four molding strips having been cut to a suitable length, they are applied to the margins of the wire cloth in the manner above described. One of the strips, preferably one of the longer pieces, is secured to a bench or other convenient working surface, by means of clamps or screws. Traction is then made on the opposite molding member until the screen is properly stretched when the said member is fastened to the bench in the same manner as the first. The end moldings are then stretched apart and secured to the bench. The corner pieces 13 are next placed in position to cover the mitered corners and securely soldered to the moldings. The temporary clamps or screws having been removed the frame thus formed with the screen attached may be applied to the screen frame and fastened with screws as above stated.

Having thus described my invention what I claim, is

1. A screen composed of frame members each consisting of a single strip of metal bent into tubular form, with overlapping in- 2. A screen composed of frame members each consisting of a single strip of metal bent into tubular form with a fiat base, convex outer face and inwardly curved overlapping margins, a screen fabric having its edges arranged between and clamped by said margins and with a portion adjacent its edges underlying said flat base, and means for holding said frame members in their tubular form.

3. A screen composed of frame members each consisting of a single strip of metal bent into tubular form with overlapping margins along the outer edge of the frame, the inner margin being curved inwardly, a screen fabric having its marginal portions bent around the curved edge of the frame, and means for holding said frame members in their tubular form, said means adapted to penetrate said screen fabric. I

4. In a screen, the combination with a supporting frame of frame members consisting of tubular structures open along one side, the margins of the opening overlapping, and the inner margin recurved, a screen fabric having its edges upturned and engaged by the margins of the frame members, corner pieces connecting the adjacent frame members and means for attaching the screen to the supporting frame.

In testimony whereof I afiiX my signature in the presence of two witnesses. NICHOLAS ELLWVART.

Witnesses:

GERRIT PoN, JOHN WVILDMAN. 

